68574581 has 2 divisors, whose sum is σ = 68574582. Its totient is φ = 68574580.

The previous prime is 68574577. The next prime is 68574587. The reversal of 68574581 is 18547586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60684100 + 7890481 = 7790^2 + 2809^2 .

It is a cyclic number.

It is not a de Polignac number, because 68574581 - 2² = 68574577 is a prime.

It is a super-2 number, since 2×68574581² = 9404946318651122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68574587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34287290 + 34287291.

It is an arithmetic number, because the mean of its divisors is an integer number (34287291).

Almost surely, 2^68574581 is an apocalyptic number.

It is an amenable number.

68574581 is a deficient number, since it is larger than the sum of its proper divisors (1).

68574581 is an equidigital number, since it uses as much as digits as its factorization.

68574581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 44.

The square root of 68574581 is about 8280.9770558793. The cubic root of 68574581 is about 409.3119154662.

The spelling of 68574581 in words is "sixty-eight million, five hundred seventy-four thousand, five hundred eighty-one".